MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1204.002 Malicious Link
The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The document body, though heavily obfuscated, contains a URL that matches the redirector link found in the heuristics. The primary malicious indicator is the presence of a link to `ttraff.ru`, which is known malicious infrastructure. The document also contains numerous links to `static.usrfiles.com`, which appear to be part of a link farm.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 4
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PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINKPDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARMSmall PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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Embedded URL info EMBEDDED_URLOne or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.URL https://ttraff.ru/wix?keyword=tecnologia+3+eso+ejercicios+resuelto
- https://static.usrfiles.com/ugd/b8c837_ef21abd4d10d4d0490ede476d398db3f.pdf
- https://static.usrfiles.com/ugd/81d6a4_81b20bfb10414471a2642fcdbcf8f5f1.pdf
- https://static.usrfiles.com/ugd/d775a9_d195911cd8344c0abe7aa95b48d4ab9f.pdf
- https://static.usrfiles.com/ugd/9e53d4_b262d42731534ef7997845263ac69954.pdf
- https://static.usrfiles.com/ugd/2f7815_5b0c7fd7422543ceabd39cb9da956791.pdf
- https://static.usrfiles.com/ugd/f80014_198a1b1695e04a9eb34938c0900a462b.pdf
- https://static.usrfiles.com/ugd/b8c837_1008a45593a0482ba727a4884fcec52b.pdf
- https://static.usrfiles.com/ugd/b8c837_e78df294ef654ab2b940ce7421fba450.pdf
- https://static.usrfiles.com/ugd/724fb5_00406bf851a540059305a9520a0c541e.pdf
- https://static.usrfiles.com/ugd/8a419d_d167ad1aaf5142ec858128d8ed151072.pdf
- https://static.usrfiles.com/ugd/b8c837_c970f4ca78c74065a324323e999182f0.pdf
- https://static.usrfiles.com/ugd/217d68_984a9ddfbf954b349eac69baf6d04997.pdf
- https://static.usrfiles.com/ugd/b8c837_a69c188e6dac4e05bb7d09d2ebeec3c7.pdf
- https://static.usrfiles.com/ugd/d54300_2e2c9dce076249e1b1d6bcf0159b4339.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off000064a0.bin503ffffc5c0c101c77f8fc2bdbfbbc4efaa8d817bb0e9c8393cbb46e08223249 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x64A0 | 5036 bytes |
font_01_sfnt_off000075cb.binfe72ae0dbb23994ca5a197553881dbce3815903fd462a9cffedaf6b94ed509b4 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x75CB | 11540 bytes |
font_02_sfnt_off00009b64.bin1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x9B64 | 4324 bytes |
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